Features 1.Low Noise: The 48DP motor pinion gear works smoothly with little roughness and noise, which rolls smoothly 2.Screw Installation: Good processing makes the gear roll smoothly, with fixed screw holes, easy installation, simple operation, equipped with screws 3.5 Tooth: The package offers five different tooth count pinions, giving you more choice in gear ratios 4.Scope of Application: The appearance of Pinion gear is treated with anti rust treatment, which can replace old parts or damaged originals, suitable for 1/10 remote control model car 5.0mm shaft motor 5.Heat Treatment: The 48DP pinion gear is made of chrome molybdenum alloy steel, with heat treatment process, with hardness and wear resistance Specification Item Type: 48DP Pinion Gear Set Material: Chrome Molybdenum Alloy Steel Colour: Black Number of Teeth: 20T, 21T, 22T, 23T, 24T Gear Pitch: 48DP/0.53M Center Aperture: Approx. 5.0mm/0.2in 20T Size: Approx. 11.5 x 10mm / 0.5 x 0.4in 21T Size: Approx. 12 x 10mm / 0.5 x 0.4in 22T Size: Approx. 12.5 x 10mm / 0.5 x 0.4in 23T Size: Approx. 13 x 10mm / 0.5 x 0.4in 24T Size: Approx. 13.5 x 10mm / 0.5 x 0.4in Suitable: For 1/10 RC Car Motor 5.0mm/0.2in Shaft Package List 5 x 48DP Pinion Gear 5 x Machine Screws